5 doctors weighed in:
Why will a pulmonary embolism cause low o2 but not high co2?
5 doctors weighed in

Dr. Asaf Presente
Internal Medicine - Pulmonary Critical Care
3 doctors agree
In brief: V/Q mismatch
A large pe will cause elevated c02 and require more respiratory effort because the physiologic "dead space" will increase and the body may not be able to compensate with increased breathing.
For the same reason the affected area of lung cannot participate in gas exchange which may lead to inadequate oxygenation - or low o2.

In brief: V/Q mismatch
A large pe will cause elevated c02 and require more respiratory effort because the physiologic "dead space" will increase and the body may not be able to compensate with increased breathing.
For the same reason the affected area of lung cannot participate in gas exchange which may lead to inadequate oxygenation - or low o2.
Dr. Asaf Presente
Dr. Asaf Presente
Thank
Dr. Dennis Clifford
Internal Medicine - Pulmonary Critical Care
1 doctor agrees
In brief: Ventilation
A pulmonary embolism causes the respiratory rate to increase and it is easier to eliminate co2 than it is to oxygenate.
Also in some severe cases the co2 can indeed be increased which is a poor prognostic sign.

In brief: Ventilation
A pulmonary embolism causes the respiratory rate to increase and it is easier to eliminate co2 than it is to oxygenate.
Also in some severe cases the co2 can indeed be increased which is a poor prognostic sign.
Dr. Dennis Clifford
Dr. Dennis Clifford
Thank
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